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Perchoerus nanus
Taxonomy
Thinohyus nanus was named by Marsh (1894) [also said to be 1892]. Its type specimen is YPM 11784, a mandible, and it is a 3D body fossil.
It was synonymized subjectively with Perchoerus probus by Pearson (1923); it was considered a nomen dubium by Wright (1998); it was recombined as Perchoerus nanus by Hay (1902), Scott (1940), Prothero (2009) and Prothero (2021).
It was synonymized subjectively with Perchoerus probus by Pearson (1923); it was considered a nomen dubium by Wright (1998); it was recombined as Perchoerus nanus by Hay (1902), Scott (1940), Prothero (2009) and Prothero (2021).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Perchoerus nanus Marsh 1894
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. R. Prothero 2009 | medium-size species of Perchoerus (ml-3 length = 38-44 mm); distinguished from P. minor by its larger size, slightly larger teeth, and more elongate and complex hypoconulid on m3; distinguished from P. probus by its much smaller size, slightly smaller cheek teeth, trapezoid-shaped upper molars, much smaller M3 with a reduced metacone and posterior cingulum, and shorter m3 hypoconulid with more complex cusp patterns. |